Source/WebCore/rendering/FlowThreadController.cpp

   1 /*
   2  * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
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   6  * are met:
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   9  *    copyright notice, this list of conditions and the following
  10  *    disclaimer.
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  12  *    copyright notice, this list of conditions and the following
  13  *    disclaimer in the documentation and/or other materials
  14  *    provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "AS IS" AND ANY
  17  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  19  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
  20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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  26  * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
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  29
  30 #include "config.h"
  31
  32 #include "FlowThreadController.h"
  33
  34 #include "RenderFlowThread.h"
  35 #include "RenderNamedFlowThread.h"
  36 #include "WebKitNamedFlow.h"
  37 #include "WebKitNamedFlowCollection.h"
  38 #include <wtf/text/AtomicString.h>
  39
  40 namespace WebCore {
  41
  42 PassOwnPtr<FlowThreadController> FlowThreadController::create(RenderView* view)
  43 {
  44     return adoptPtr(new FlowThreadController(view));
  45 }
  46
  47 FlowThreadController::FlowThreadController(RenderView* view)
  48     : m_view(view)
  49     , m_currentRenderFlowThread(0)
  50     , m_isRenderNamedFlowThreadOrderDirty(false)
  51 {
  52 }
  53
  54 FlowThreadController::~FlowThreadController()
  55 {
  56 }
  57
  58 RenderNamedFlowThread* FlowThreadController::ensureRenderFlowThreadWithName(const AtomicString& name)
  59 {
  60     if (!m_renderNamedFlowThreadList)
  61         m_renderNamedFlowThreadList = adoptPtr(new RenderNamedFlowThreadList());
  62     else {
  63         for (RenderNamedFlowThreadList::iterator iter = m_renderNamedFlowThreadList->begin(); iter != m_renderNamedFlowThreadList->end(); ++iter) {
  64             RenderNamedFlowThread* flowRenderer = *iter;
  65             if (flowRenderer->flowThreadName() == name)
  66                 return flowRenderer;
  67         }
  68     }
  69
  70     WebKitNamedFlowCollection* namedFlows = m_view->document()->namedFlows();
  71
  72     // Sanity check for the absence of a named flow in the "CREATED" state with the same name.
  73     ASSERT(!namedFlows->flowByName(name));
  74
  75     RenderNamedFlowThread* flowRenderer = new (m_view->renderArena()) RenderNamedFlowThread(m_view->document(), namedFlows->ensureFlowWithName(name));
  76     flowRenderer->setStyle(RenderFlowThread::createFlowThreadStyle(m_view->style()));
  77     m_renderNamedFlowThreadList->add(flowRenderer);
  78
  79     // Keep the flow renderer as a child of RenderView.
  80     m_view->addChild(flowRenderer);
  81
  82     setIsRenderNamedFlowThreadOrderDirty(true);
  83
  84     return flowRenderer;
  85 }
  86
  87 void FlowThreadController::layoutRenderNamedFlowThreads()
  88 {
  89     ASSERT(m_renderNamedFlowThreadList);
  90
  91     if (isRenderNamedFlowThreadOrderDirty()) {
  92         // Arrange the thread list according to dependencies.
  93         RenderNamedFlowThreadList sortedList;
  94         for (RenderNamedFlowThreadList::iterator iter = m_renderNamedFlowThreadList->begin(); iter != m_renderNamedFlowThreadList->end(); ++iter) {
  95             RenderNamedFlowThread* flowRenderer = *iter;
  96             if (sortedList.contains(flowRenderer))
  97                 continue;
  98             flowRenderer->pushDependencies(sortedList);
  99             sortedList.add(flowRenderer);
 100         }
 101         m_renderNamedFlowThreadList->swap(sortedList);
 102         setIsRenderNamedFlowThreadOrderDirty(false);
 103     }
 104
 105     for (RenderNamedFlowThreadList::iterator iter = m_renderNamedFlowThreadList->begin(); iter != m_renderNamedFlowThreadList->end(); ++iter) {
 106         RenderNamedFlowThread* flowRenderer = *iter;
 107         flowRenderer->layoutIfNeeded();
 108     }
 109 }
 110
 111 void FlowThreadController::registerNamedFlowContentNode(Node* contentNode, RenderNamedFlowThread* namedFlow)
 112 {
 113     ASSERT(contentNode && contentNode->isElementNode());
 114     ASSERT(namedFlow);
 115     ASSERT(!m_mapNamedFlowContentNodes.contains(contentNode));
 116     ASSERT(!namedFlow->hasContentNode(contentNode));
 117     m_mapNamedFlowContentNodes.add(contentNode, namedFlow);
 118     namedFlow->registerNamedFlowContentNode(contentNode);
 119 }
 120
 121 void FlowThreadController::unregisterNamedFlowContentNode(Node* contentNode)
 122 {
 123     ASSERT(contentNode && contentNode->isElementNode());
 124     HashMap<Node*, RenderNamedFlowThread*>::iterator it = m_mapNamedFlowContentNodes.find(contentNode);
 125     ASSERT(it != m_mapNamedFlowContentNodes.end());
 126     ASSERT(it->second);
 127     ASSERT(it->second->hasContentNode(contentNode));
 128     it->second->unregisterNamedFlowContentNode(contentNode);
 129     m_mapNamedFlowContentNodes.remove(contentNode);
 130 }
 131
 132 void FlowThreadController::removeFlowThread(RenderNamedFlowThread* flowThread)
 133 {
 134     m_renderNamedFlowThreadList->remove(flowThread);
 135     setIsRenderNamedFlowThreadOrderDirty(true);
 136 }
 137
 138 } // namespace WebCore